Impact of Nasal Glucocorticoid Therapy on Exhaled Nitric Oxide and Symptom Relief in Chronic Rhinosinusitis with Nasal Polyps: A Randomized Prospective Study

The determination of FnNO is helpful for the differential diagnosis of EosCRSwNP, which is more sensitive to nasal spray glucocorticoid, and the use of nasal spray glucocorticoid post-ESS is helpful for early and rapid recovery of FnNO. FnNO measurement could not be used as an indicator to assess the recovery status of the postoperative surgical area.